ATE363546T1 - METHOD AND DEVICE FOR DECARBURIZING A MELTED STEEL - Google Patents

METHOD AND DEVICE FOR DECARBURIZING A MELTED STEEL

Info

Publication number
ATE363546T1
ATE363546T1 AT03792199T AT03792199T ATE363546T1 AT E363546 T1 ATE363546 T1 AT E363546T1 AT 03792199 T AT03792199 T AT 03792199T AT 03792199 T AT03792199 T AT 03792199T AT E363546 T1 ATE363546 T1 AT E363546T1
Authority
AT
Austria
Prior art keywords
molten steel
gas
decarburizing
melted steel
decarburization
Prior art date
Application number
AT03792199T
Other languages
German (de)
Inventor
Yuyou Zhai
Johannes Mueller
Johannes Spiess
Original Assignee
Voest Alpine Ind Anlagen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voest Alpine Ind Anlagen filed Critical Voest Alpine Ind Anlagen
Application granted granted Critical
Publication of ATE363546T1 publication Critical patent/ATE363546T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Processing Of Solid Wastes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Decarburization of molten steel (3), especially in stainless steel production in a metallurgical vessel (2) and particularly a converter, involves treatment with oxygen and an inert gas if required and especially argon and/or nitrogen. To decarburize molten steel with carbon content of =0.3 wt.%, the gas is introduced through an opening (5) below the molten steel level and a blower lance (6, 7) over the molten steel surface, to bring the gas into contact with the metal.
AT03792199T 2002-08-21 2003-07-15 METHOD AND DEVICE FOR DECARBURIZING A MELTED STEEL ATE363546T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0125002A AT411530B (en) 2002-08-21 2002-08-21 Decarburization of molten stainless steel in a converter involves delivering the treatment gas through an opening below the molten level and blower lances above it, to mix the gas thoroughly through the molten metal

Publications (1)

Publication Number Publication Date
ATE363546T1 true ATE363546T1 (en) 2007-06-15

Family

ID=3687818

Family Applications (2)

Application Number Title Priority Date Filing Date
AT0125002A AT411530B (en) 2002-08-21 2002-08-21 Decarburization of molten stainless steel in a converter involves delivering the treatment gas through an opening below the molten level and blower lances above it, to mix the gas thoroughly through the molten metal
AT03792199T ATE363546T1 (en) 2002-08-21 2003-07-15 METHOD AND DEVICE FOR DECARBURIZING A MELTED STEEL

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT0125002A AT411530B (en) 2002-08-21 2002-08-21 Decarburization of molten stainless steel in a converter involves delivering the treatment gas through an opening below the molten level and blower lances above it, to mix the gas thoroughly through the molten metal

Country Status (8)

Country Link
EP (2) EP1764421A3 (en)
CN (1) CN100532581C (en)
AT (2) AT411530B (en)
AU (1) AU2003257462A1 (en)
DE (1) DE50307383D1 (en)
ES (1) ES2287557T3 (en)
RU (1) RU2319750C2 (en)
WO (1) WO2004018714A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009049896A1 (en) * 2009-01-22 2010-08-05 Sms Siemag Ag Pulse flushing with inert gas in the BOF and AOD converter process
DE102014222727A1 (en) * 2014-11-06 2016-05-12 Sms Group Gmbh Method and device for producing a stainless steel
WO2024100435A1 (en) * 2022-11-10 2024-05-16 Arcelormittal Post combustion lance

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT216032B (en) * 1959-02-20 1961-07-10 Arbed Device for blowing a metal bath from above
NL6710354A (en) * 1966-07-27 1968-01-29
JPS5589395A (en) * 1978-12-26 1980-07-05 Sumitomo Metal Ind Ltd Gasification of solid carbonaceous material and its device
JPS6040486B2 (en) * 1979-07-03 1985-09-11 住友金属工業株式会社 steel refining method
JPS6063307A (en) * 1983-09-14 1985-04-11 Kawasaki Steel Corp Converter steel making method of dead soft steel
LU86322A1 (en) * 1986-02-25 1987-09-10 Arbed OXYGEN BLOWING LANCE
LU88023A1 (en) * 1991-10-30 1993-05-17 Arbed Blow lance
JPH06158142A (en) * 1992-11-24 1994-06-07 Sumitomo Metal Ind Ltd Vacuum decarburization refining apparatus for high chrome steel
JP3410553B2 (en) * 1994-07-27 2003-05-26 新日本製鐵株式会社 Decarburization refining method of chromium-containing molten steel
JP3167888B2 (en) * 1995-07-27 2001-05-21 川崎製鉄株式会社 Decarburization refining method of chromium-containing molten steel and upper blowing lance for refining gas

Also Published As

Publication number Publication date
EP1530648B1 (en) 2007-05-30
DE50307383D1 (en) 2007-07-12
CN1675383A (en) 2005-09-28
ES2287557T3 (en) 2007-12-16
AU2003257462A1 (en) 2004-03-11
ATA12502002A (en) 2003-07-15
WO2004018714A1 (en) 2004-03-04
EP1530648A1 (en) 2005-05-18
RU2005107698A (en) 2005-09-10
CN100532581C (en) 2009-08-26
EP1764421A3 (en) 2007-12-26
EP1764421A2 (en) 2007-03-21
RU2319750C2 (en) 2008-03-20
AT411530B (en) 2004-02-25

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